Martin Buber was a philosopher who focused on dialogue and relationships. He rejected labels like philosopher and theologian and was interested in personal experience and relationships with God rather than ideas. Buber believed that education should focus on dialogue and community. He introduced the concepts of Ich-Du and Ich-Es to describe two modes of existence - Ich-Du referring to a dialogical relationship and Ich-Es referring to a monological relationship with objects. Buber argued that people exist in one of these two modes at all times and that true education requires cultivating dialogical relationships through open communication.